search for: adschai

...ve R to act as a server. But I never know how this works. Would anyone please provide an example or introduction material where I can learn about this? I'm trying to build an environment where computation are distributed/delegated among different servers requested whenever I need. Thank you. - adschai

...trix like a cbind operation in this case? Meaning, the result should be a matrix that looks like: [,1] [,2] [1,] 1 4 [2,] 2 5 [3,] 3 6 I can loop through all elements and do cbind manually. But I think there must be a simpler way that I don't know. Thank you. - adschai

...on about 180,000 points of training set. It takes very long time to run. However, I would like it to spit out something to make sure that the run is not dead in between. Would you please suggest anyway to do so? And is there anyway to speed up the performance of this svm function? Thank you. - adschai

...e estimated coefficients as well as the t statistics for each one of them? What I would like to do ultimately is to see which coefficients are not significant and try to refit the model again by excluding those variables out. I would appreciate if anyone could give some hint on this. Thank you. - adschai [[alternative HTML version deleted]]

...nvert to time series lag_logprice = lag(ts_logprice, 1) # get the lag When I do: ts_logprice[1:10] == lag_logprice[1:10] The result returns TRUE for the first 10 elements which I do not expect that. Is there any reason to this? I'd appreciate if you could let me know. Thank you so much. - adschai [[alternative HTML version deleted]]

...s Lumley) 8. Re: Question about lme and AR(1) (Thomas Lumley) 9. Re: recommended combo of apps for new user? (Martin Brown) 10. Re: recommended combo of apps for new user? (Martin Brown) 11. Re: recommended combo of apps for new user? (hadley wickham) 12. Prerequisite for running RWeka (adschai at optonline.net) 13. Question on R server and TinnR (adschai at optonline.net) 14. Re: Prerequisite for running RWeka (Prof Brian Ripley) 15. Creating a data set within a function (Anup Nandialath) 16. Re: Creating a data set within a function (Gabor Grothendieck) 17. How to parse a stri...

...quot;, uid="user", pwd="password") According to RODBC documentation, this channel is supposed to have a type of "RODBC". However, if I declare my class as above, R will complain that it does not know about "RODBC" type or class. Please clarify. Thank you. - adschai [[alternative HTML version deleted]]

...already has something like a tree where I can extend from or I need to start from scratch. If so, what would be the most effective way to represent parent and child node relationship? I realize that R is not based on pointer so it's quite a different paradigm for me to code this. Thank you. - adschai

...ere my intercept1 is, for example, the intercept that breaks between y=1 and y=2 labels and the max(fit) is the maximum of overall fitted values or maximum of all ordinal y labels. I'm wondering if there is better way to do this? If you could let me know, I would really appreciated. Thank you.- adschai [[alternative HTML version deleted]]

...als 0. I also have another continuous predictor. The problem is that, whenever I run the tsls, I will get 'System is computationally singular' error all the time. I'm wondering if there is anyway that I can overcome this problem? Please kindly suggest. Thank you so much in advance. - adschai [[alternative HTML version deleted]]

...ave to return the frame object }) foo <- function(x,y) { objFoo <- new("foo", x=data.frame(NULL), y="") frame <- generateFrame(objFoo) # after this point, nothing got assigned to objFoo@x setX(objFoo) <- frame # this will work (why do I have to duplicate this??) } - adschai [[alternative HTML version deleted]]

...n into R, it will complain that my slot members is assigned to NULL which does not extend class "numeric". So how can I fix this? Is there any clean way to do this? This is quite a common situation but I can't seem to find a way out. Any help would be really appreciated. Thank you. - adschai

...s. However, from the document, I would need to use the covariance matrix rather then the correlation. And I need additional column for 1. I am not sure how this matrix should look like and how I can obtain this? If there is any example you could point me to, I would really appreciate. Thank you. - adschai [[alternative HTML version deleted]]

...here for myself to post my question here is to obtain your insight especially with respect to using sem with the two approaches above. I would like to ensure that my approaches make sense within the context of sem. Any comments/opinions would be really appreciated. Thank you so much in advance. - adschai [[alternative HTML version deleted]]

...omplaints that it doesn't know about 'dat' when it executes the second line. Below is the exact error that I got when executing the stepAIC line above:Error in eval(expr, envir, enclos) : object "dat" not foundWould you please provide some guide to circumvent this? Thank you.- adschai [[alternative HTML version deleted]]

...ults (all attributes of the result object) from the chisq.test or mantelhaen.test functions? For example, from chisq.test function, you will have statistic, parameter, p.value, expected, etc. in the result list. How can I save all of them in one shot to, says, a text file or csv file? Thank you. - adschai

...ed on Category Utility function. However, if I would like to specify my own objective function, how can I do so? 3. I have about 130,000 data points (each with about 50 attributes) for training and another same amount for testing. Would this cause any memory or performance problem? Thank you, - adschai

...looked into task manager, windows already stopped my Rgui process. I am quite disappointed with this. I would really appreciate if anyone finds a solution to go around this windows vista problem? Particularly, how to turn off this feature in vista? Any help would be really appreciated. Thank you!- adschai [[alternative HTML version deleted]]

...hat I need from polr. However, I'm wondering how I can obtain the standard error of each estimated coefficient? I saved the Hessian and do something like summary(polrObj), I don't see any standard error like when doing regression using lm. Any help would be really appreciated. Thank you! - adschai

...t seems that in mle one can only specify the bound of the unknowns forming the likelihood function. But I would like to specify something like, a = 2b or a <= 2b where 'a' and 'b' could be my parameters in the likelihood function. Any help would be really appreciated. Thank you!- adschai [[alternative HTML version deleted]]